Alarm clock



FIG. 1 is a front right perspective view of an alarm clock;

FIG. 2 is a front elevational view of an alarm clock;

FIG. 3 is a top plan view of an alarm clock;

FIG. 4 is a left side elevational view of an alarm clock

FIG. 5 is a rear elevational view of an alarm clock; and,

FIG. 6 is a bottom plan view of an alarm clock. 

The ornamental design for an alarm clock, as shown. 